The Rat King is a Teenage Mutant Ninja Turtles villain. Formerly known as Victor Falco, he was a scientist presumably working for the Kraang on an experiment involving mutagen and monkey DNA. He was later exposed to a neurochemical that deformed him into a corpse-like state while enabling him to control rats and took on the name Rat King. The explosion in his lab that caused this also took his sight, leaving him blind. Rat King is eventually killed when Splinter throws him off a ledge in the Undercity.